基于已知信息的QC-LDPC 码截短研究

截短(shortening)是一种实现可变速率低密度奇偶校验码(LDPC, Low-Density Parity-Check Codes)的方法,其思想是通过删除校验矩阵中的一些信息比特,来达到实现变化码率和码长的目的.基于标准化通信系统所传输的数据中的已知信息,结合LDPC码的相关截短理论,对已知信息进行删除,设计可变速率的准循环 LDPC 码(QC-LDPC),以实现一种高性能、低复杂度、可变速率、可被多种通信标准采用的QC-LDPC 码.

Shortening of QC-LDPC Code based on Known Information

Shortening is a method for obtaining variable rate of LUFC coae. Ine concept ol shortening is, through removing some information bits of the check matrix, to achieve a code with shorter length and lower rate from a given LDPC code. Based on the known information transmitted by the standardized communication system and in combination with the shortening theory of LDPC code, the known information is removed, and the variable rate QC-LDPC code designed, thus to achieve a variable rate LDPC code with relatively high performance and low complexity, which could be adopted in various communication standard systems.